Addis Ababa: The Ebola epidemic is decreasing but is still present in a third of the areas of the three affected west African nations, UN Ebola coordinator David Nabarro warned Thursday.

"We still see occasional flare-ups and we still see some surprises with new cases out of our contact lists," Nabarro told AFP, speaking at the African Union headquarters as leaders gather a day ahead of a summit meeting, where Ebola is a key issue for discussion. "That means that the epidemic is not contained yet," he said.